1403640081 has 12 divisors (see below), whose sum is σ = 2027963652. Its totient is φ = 935536896.

The previous prime is 1403640059. The next prime is 1403640193. The reversal of 1403640081 is 1800463041.

1403640081 is a `hidden beast` number, since 14 + 0 + 3 + 640 + 0 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 476985600 + 926654481 = 21840^2 + 30441^2 .

It is not a de Polignac number, because 1403640081 - 2⁹ = 1403639569 is a prime.

It is a super-2 number, since 2×1403640081² = 3940410953979373122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1403640001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27165 + ... + 59541.

It is an arithmetic number, because the mean of its divisors is an integer number (168996971).

Almost surely, 2^1403640081 is an apocalyptic number.

It is an amenable number.

1403640081 is a deficient number, since it is larger than the sum of its proper divisors (624323571).

1403640081 is a wasteful number, since it uses less digits than its factorization.

1403640081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37200 (or 37197 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1403640081 is about 37465.1849188016. The cubic root of 1403640081 is about 1119.6576549872.

The spelling of 1403640081 in words is "one billion, four hundred three million, six hundred forty thousand, eighty-one".